Brush-connector for electroplating-generators.



3.1x FLYNN.

BRUSH CONNECTOR FOR ELECTROPLATING GENERATORS.

APPUCATION FILED JAH..29| 1916.

1,296,941. Patented Mar. 11,1919.

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J. J. FLYNN.

BRUSH CONNECTOR FOR ELECTROPLA TING GENERATORS. APPLICATION FILEDJAN-29,1916.

296,941 v Patented Mar. 11,1919;

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UNITED STATES PATENT OFFICE.

JOHN J. FLYNN, OF IRVINGTON, JERSEY, ASSIGNOR TO CONNECTICUT DYNAMO ANDMOTOR COMPANY, A CORPORATION OF NEW YORK.

BRUSH-CONNECTOR FOR ELECTROPLATING-GENERATORS.

Specification of Letters Patent.

Patented Mar. 11, 1919.

Application filed January 29, 1916. Serial No. 75,065.

To all whom it may concern:

' Be it known that 1, JOHN J. FLYNN, a citizen of the United States, anda resident of Irvington, in the county of Essex and State of New Jersey,have invented certain Improvements in Brush- Connectors forElectroplating-Generators, of which the following is a specification.

The objects of my. invention are to provide a bipolar electroplatinggenerator having double wound armature and double commutator withdevices which will conveniently permit the generator to be arranged fordelivering the total output at a voltage equal to the difference ofpotential of the terminals at one end of the generator, or to deliverthe total output at a voltage equal to twice the difference of potentialof said terminals, or to divide the output so that it may be deliveredin part at one voltage and in part at the other; to thus make itpossible for electroplating generators to'be manufactured and placed instock, ready for sale, adapted to fill a demand for either voltage asrequired; to provide for accomplishing the foregoing objects certainyokes or are bars which enable all the lead cables to be short and ofuniform length; to locate all said lead cables at one side of thegenerator and provide connecting means for attaining the said differentoutputs; to secure a device which shall be simple to manufacture and tomanipulate, and to obtain other advantages and results as may be broughtout in the following description.

Referring to the accompanying drawings, in which like numerals ofreference indicate the same parts throughout the several views,

Figure 1 is a plan view of a generator of my improved construction, withsome of its parts in cross-section;

Fig. 2 is a side elevation of the same showing the armature leadsconnected in parallel at the transfer panel, for delivering the totaloutput of the machine at a voltage equal to the difference of potentialof the terminals at one end of the generator;

Fig. 3 is a side view of one of the yokes or are bars, looking endwiseof the generator, and showing its relation to the other parts;

Fig. 1 is an elevation of the transfer panel with the armature leadsconnected to deliver either in parallel or in series, that is to say,either at a voltage equal to the difference of potential of theterminals atone end of the generator or at a voltage of twice thatamount;

' Fig. 5 is like Fig. 4 except that the neutral terminal lug is left011' so that the total output of the machine will be delivered at thedouble voltage;

Fig. 6 is a plan illustrating the preferred detail arrangement of yokesand related parts, partly in section, and Fig. 7 is an elevation of oneof the yokes in said preferred arrangement, looking endwise of thegenerator.

In said drawings and referring particularly to Figs. 1 and 2, a bipolardouble wound armature double commutator electroplating generator isshown provided at one end with a brush holder stud 10 connected to ayoke or are bar 11 which is also supported by the other brush holderstud 12 through the medium of an insulating bushing 13 which alsosupports the brush holder stud 12 in position in the usual manner. Theyoke 11 also provides a terminal socket 14 into which is inserted heavycable armature lead 15, which has a coupling 16 at its opposite end. Thebrush holder stud 12 is attached to a terminal 17 which is attached to alead 18 having a coupling 19 at its other end. The leads 15 and 18 aresimilar to each other and have a: difference ofpotential.

At the other end of the generator a brush holder stud 20 carries a yokeor are bar 21, which is also supported by the other brush holder stud22, through the medium of an insulating bushing 23 which also supportsthe brush holder stud 22 in position in the usual manner. The yoke 21also provides a terminal socket 24 into which is inserted a heavy cablearmature lead 25, which has a coupling 26at its opposite end. The brushholder stud 22 is attached to a terminal 27, which is attached to a lead28 having a coupling 29 at its opposite end.

The leads 25 and 28' are similar to each other and have a difference ofpotential, and these leads are also similar to the leads 15 and 18. Theleads 15 and 25 are of similar polarity and are connected through theirrespective couplings 16 and 26 to the connecting bar 30 which isprovided with a socket 31, from which a cable may carry current to aplating tank. The

connecting bar 30 is mounted on a transfer panel 32, which is made ofinsulating material and secured to the front of the gen erator. Theleads 18 and 28 are of similar polarity and are connected through theirrespective couplings l9and 29 to the connecting bar 33, which isprovided with a socket 34 from which a cable may carry current to theplating tank. In the parallel arrangement of the leads shown in Figs. 1and 2,. the generator delivers its total output from the transfer panel.to the plating tank at. a voltage equal to'the difierence of potentialof the terminals at one end of the generator.

In Fig. 4 the connecting bar 33 has been removed, and the leads 25 and28 crossed at the transfer panel 32, so that there is a difference ofpotential between the connect ing socket 31 and a socket 35 which isshown connected to the coupling 19 through a short connecting bar 36,equal to the difference of potential of the terminals at one end of thegenerator. There is also an equal difference of potential between thesocket 31 and a socket 37 which is connected to the coupling 26 by ashort connecting bar 38. Thus one plating tank can be operated byconnecting it to the sockets 31 and 35, a second tank can be similarlyoperated by connecting it to the socket 31 and 37, and a third tank canbe operated at double the voltage of the others by connecting it tothesockets and 37. In this third tank the full difference of potential ofthe double armature in series is utilized.

In Fig. 5 the socket31 is left 0H, so that the generator acts as astraight double voltage generator with the armature windings in series;the connections are otherwise the same as in Fig. 4.

In Fig. 3 the shape of the yoke or are bar 11 is shown to illustrate theconvenient practical manner in which it allows all the leads to be madeshort, similar to each other, and to all be brought to the transferpanel 32 at the front of the generator.

In Figs. 6 and 7 I have illustrated a preferred form and arrangement ofthe yoke and related parts, in which the stud 40 for the brush holderneXt the side of the machine at which the lead cables and transfer panelare situated is provided between the brushes and carrier 39 with a stop41, whlch is an integral collar, which carries a socket 42. adapted toreceive the lead cable 15.

The stud 40 projects beyond said stop 41 and receives an insulatingsleeve 43 which extends through the arm of the carrier 39 as is common,with washers on opposite sides thereof for insulation. The sleeve 43outside the insulated carrier arm receives the yoke 44, which ispreferably apertured to slip over the sleeve and stud, and then outsidesaid yoke is another insulating washer and a nut 45 threaded upon the.end of the stud to clamp between itself and the stop 41 all the saidparts upon the insulating sleeve.

The stud 46 for the opposite commutator at that end of the generator isof substantially the construction shown in Figs. 15 inclusive, its stop47 being spaced from "the brushes to correspond in position to the oneon the stud 40 just described. Outside this stop is an insulating sleeveand washers for the carrier 39 and outside of them the stud receives theend of the yoke 44, which is preferably apertured to slip onto the stud.It will be understood that there is no insulation between the yoke andthis stud, and a nut 48 clamps between itself and the stop 47 all thesaid parts.

The yoke 44 in this preferred construction differs from the yoke inFigs. 13 inclusive in that its terminal socket 49 does not project fromthe extreme end of the yoke, but from a point below or short of saidend, as shown in Fig. 7. It will be understood that the nut 45 outsidesaid end of the yoke.

is a part of one terminal at that endof the generator, while theterminal socket of the yoke is a part of the other terminal, and so itis desirable to separate the two in order that in the use of a wrenchupon said nut connection be not inadvertently made between the nut andthe terminal socket of the yoke. It has been found that if the terminalsocket is set back from the end or offset, as shown in Fig. 7, theliability of such short circuiting is avoided.

It will be understood that in the construction shown in Fig. 6, likethat shown in Figs. 1 and 2, both end of the generator are alike, sothat the description given above for one end does not need to berepeated for the other.

Having thus described the invention, what I claim is.

1. In a generator for heavy current of low voltage, the combination ofarevoluble shaft, an armature and commutator bars carried by said shaft,a brush holder stud of one sign located upon one side of said shaft, abrush holder stud of a different sign located upon the side of saidshaft opposite the first-mentioned stud, a yoke mounted on thefirst-mentioned stud and in direct conductive connection therewitln'saidyoke curving in the proximate form of a semi-' circle past said shaftand supported by the said second-mentioned stud in insulated relationthereto, and terminal sockets for lead cables one upon saidsecond-mentioned stud and theother upon said yoke at a point adjacentsaid second-mentioned stud.

2. In the generator for heavy currents of low voltage, the combinationof a revoluble shaft, an armature and commutator bars carried by saidshaft, a brush holder stud of one sign located upon one side of saidshaft, a brush holder stud of a diiferent sign located upon the side ofsaid shaft diametrically opposite the first-mentioned stud, an arc barconnected to the first-mentioned stud and in direct conductiveconnection therewith, said are bar curving in the proximate form of asemi-circle around said shaft and provided With a hole through Whichsaid second-menti0ned stud extends, a sleeve of insulating materialencircling said secondmentioned stud and extending through said hole, aconductor connected to said secondmentioned stud, and a second conductorconnected to said are bar at a point in close proximity to saidecond-mentioned stud.

3. In a generator for heavy currents of low voltage, the combination ofa revoluble shaft, an armature and commutator bars carried by saidshaft, a brush holderstud of one sign located upon one side of saidshaft, a brush holder stud of a different sign located upon the side ofsaid shaft opposite the first mentioned stud, a yoke connected to thefirst-mentioned stud and in direct conductive connection therewith, saidyoke curving in the proximate form of a semi-circle past said shaft andsupported by the said second-mentioned stud in insulated relationthereto, means at the outer side of said yoke for securing it to saidstud, and terminal sockets for lead cables one upon saidsecond-mentioned stud and the other upon said yoke at a point back fromits end which is secured to said second-mentioned stud, whereby thesecuring means may be manipulated freely and independently of saidterminal socket.

JOHN J. FLYNN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

